Hi fellow audi drivers. Im stumped and running out of car funding. Ive replaced spark plugs, wires, maf sensor, k&n air filter, all O2 sensors, cham shaft sensor, timing belt, water pump, thermostat, all vacuum hoses and the evap purge solenoid. After all that the car still has a code P0507 and cant figure out why the car still has a flutter/sputtering at low acceleration. If I step on it (40%+ throttle) the car speeds up without issue. So only at low acceleration an idle does the car sputter. Any ideas, comments, advice would be greatly appreciated. I have a 01 A4 2.8 v6 fwd B5 model. Thank you again for the help

 

Look up the procedure for a throttle adaptation and try it out - it may help the problem.

 

Thats what I was going to look at now that I replaced all my vacuum lines and crankcase breather system hoses. Those were shot! Such a poor design from such a reputable manufacturer. Ill google the throttle adjustment next, if u have a link handy post it. It would be appreciated and thanks for the prior advice